A Flash Flood Watch remains in effect for D.C., Anne Arundel County, Carroll County, Harford County, Howard County, Montgomery County, Northern Baltimore County, Prince Georges County and Southern Baltimore County until 6 a.m. Thursday.

Flood Warning remains in effect for Frederick County until 5 a.m.

A Flood Warning has been extended until 3:30 a.m. Thursday for Anne Arundel County, Prince George’s County, Howard County, Carroll County, Frederick County, Baltimore County, Baltimore City and Harford County.

A Flood Warning has been extended in D.C. until midnight Wednesday.

A Coastal Flood Warning remains in effect for D.C., Anne Arundel County, Howard County, Montgomery County, Prince George’s County, Calvert County, Southern Baltimore County, and St. Mary’s County until midnight Wednesday.

The warning means flooding is imminent or has already occurred.

The heaviest precipitation was falling Wednesday as the same system that generated devastating tornadoes in the south could also bring damaging thunderstorms along with drenching rains to the area.

Emergency officials in Maryland say crews have rescued motorists who got stranded in high water on closed roads. Road closures have been reported due to flooding, downed trees and electrical lines.

Maryland officials are urging travelers to watch out for the possibility of flooding across the state.